STRETCH DRAW DIE AND METHOD

摘要

A die assembly for draw stamping sheet metal in a press has an upper die structure and a lower die structure, each constructed and arranged to be mounted on a press for reciprocal movement therebetween. The upper die structure and the lower die structure have complementary stamping surfaces for stamping sheet metal to a desired configuration. A clamping assembly and a stretching assembly grip the sheet metal along opposite sides of the complementary stamping surfaces and drivingly move apart pre-stretching the sheet metal as the upper die structure and the lower die structure are closed to stamp the sheet metal to the desired configuration.